Simple Homogenization Models for the Limit and Non-Linear Analysis of Masonry Structures Loaded In- and Out-of-Plane

2015 ◽  
pp. 111-133
Author(s):  
G. Milani
Keyword(s):  
Linear Analysis ◽  
Masonry Structures ◽  
Non Linear ◽  
Out Of Plane

scholarly journals Non-Linear Analysis of Masonry Structures Subjected to External Settlements

2013 ◽  
Vol 03 (02) ◽  
pp. 18-26 ◽  
Author(s):  
Stefano Galassi ◽  
Michele Paradiso ◽  
Giacomo Tempesta
Keyword(s):  
Linear Analysis ◽  
Masonry Structures ◽  
Non Linear

scholarly journals Non-Linear Analysis of Inter-Story Pounding between Wood-Framed Buildings during Ground Motion

Geosciences ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 488 ◽  
Author(s):  
Wojciech Migda ◽  
Marcin Szczepański ◽  
Natalia Lasowicz ◽  
Anna Jakubczyk-Gałczyńska ◽  
Robert Jankowski
Keyword(s):  
Ground Motion ◽  
Structural Damage ◽  
Seismic Analysis ◽  
Longitudinal Direction ◽  
Linear Analysis ◽  
Masonry Structures ◽  
The Finite Element Method ◽  
Steel Reinforced Concrete ◽  
Total Destruction ◽  
Non Linear

Pounding between adjacent buildings during ground motion may result in structural damage or lead to total destruction of structures. The research on the phenomenon has recently been much advanced; however, the analyses have been carried out only for concrete, steel, and masonry structures, while pounding between wooden buildings has not been studied so far. The aim of this paper is to show the results of detailed non-linear seismic analysis of inter-story pounding between the wood-framed buildings modelled by using the finite element method. Firstly, the modal analysis of the structures was conducted. Then, the detailed non-linear analysis of earthquake-induced collisions between two wood-framed buildings of different heights was carried out. The results of the analysis indicate that the behavior of both structures in the longitudinal as well as in the transverse direction is significantly influenced by interactions. The response of the taller building is increased in both directions. On the other hand, the response of the lower building is decreased in the longitudinal direction, while it is increased in the transverse one. The results of the study presented in the paper indicate that, due to deformability of buildings made of wood, structural interactions may change their responses much more, as compared to steel, reinforced concrete, or masonry structures.

scholarly journals Geometric Non-Linear Analysis of Auxetic Hybrid Laminated Beams Containing CNT Reinforced Composite Materials

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3718
Author(s):  
Xu-hao Huang ◽  
Jian Yang ◽  
Iftikhar Azim ◽  
Xing-er Wang ◽  
Xin Ren
Keyword(s):  
Poisson’S Ratio ◽  
Shear Deformation Theory ◽  
Linear Analysis ◽  
Poisson's Ratio ◽  
Perturbation Approach ◽  
Maximum Magnitude ◽  
Reinforced Composite ◽  
Non Linear ◽  
Out Of Plane ◽  
Deflection Theory

In the current work, a novel hybrid laminate with negative Poisson’s ratio (NPR) is developed by considering auxetic laminate which is composed of carbon nanotube-reinforced composite (CNTRC) and fiber-reinforced composite (FRC) materials. The maximum magnitude of out-of-plane NPR is identified in the case of (20 F/20 C/−20 C/20 C) S laminate as well. Meanwhile, a method for the geometric non-linear analysis of hybrid laminated beam with NPR including the non-linear bending, free, and forced vibrations is proposed. The beam deformation is modeled by combining higher-order shear-deformation theory (HSDT) and large deflection theory. Based on a two-step perturbation approach, the asymptotic solutions of the governing equations are obtained to capture the linear and non-linear frequencies and load-deflection curves. Moreover, a two-step perturbation methodology in conjunction with fourth-order Runge–Kutta method is employed to solve the forced-vibration problem. Several key factors, such as CNT distribution, variations in the elastic foundation, and thermal stress, are considered in the exhaustive analysis. Theoretical results for some particular cases are given to examine the geometric non-linearity behavior of hybrid beam with NPR as well as positive Poisson’s ratio (PPR).

Simplified non-linear analysis of plates subjected to hydrocarbon explosions

2002 ◽  
Vol 37 (4) ◽  
pp. 301-312 ◽  
Author(s):  
L. A Louca ◽  
M. A Wadee
Keyword(s):  
Linear Analysis ◽  
Membrane Action ◽  
Element Analysis ◽  
Linear Finite Element ◽  
Previous Formulation ◽  
Non Linear ◽  
Out Of Plane ◽  
Analysis Package ◽  
Linear Differential ◽  
Plane Displacement

An elastic Lagrangian formulation for an unstiffened plate subject to blast loading is presented. Building on a previous formulation, which accounted for membrane strains from purely out-of-plane displacement, the addition of in-plane stretching highlights the importance of membrane action. Numerical results of the resulting system of non-linear differential equations from the new model are compared with a non-linear finite element analysis package in terms of the various displacements and membrane strains, with good correlation.

scholarly journals A Multi-Scale Analysis Based on a Map-Oriented Database for the Out-of-Plane Seismic Behaviour of Masonry Structures

2021 ◽  
Author(s):  
Chenjie Yu ◽  
Sander Meijers
Keyword(s):  
Kinematic Analysis ◽  
Linear Time ◽  
Time History ◽  
Unreinforced Masonry ◽  
Masonry Structures ◽  
Seismic Behaviour ◽  
Accurate Analysis ◽  
Multi Scale ◽  
Non Linear ◽  
Out Of Plane

Abstract Since 1986, earthquakes have occurred in East Groningen , but most houses, schools and are made of unreinforced masonry, which must now withstand magnitude 4 earthquakes. This has created an urgent need to assess large amounts of buildings in a fast but reliable manner. The out-of-plane behaviour is important for seismic assessments of unreinforced masonry buildings. Although the most accurate analysis method to determine the out-of-plane response of such walls is non-linear time-history analysis ( NLTH ), non-linear kinematic analysis ( NLKA ) provides a simple, fast but still reliable solution due to the computational difficulties of NLTH for structures constructed of unreinforced masonry. In this paper, the out-of-plane behaviours of masonry structures are up-scaled from a component scale to a provincial scale in a multi-scale manner. A map-oriented database is established to describe both local behaviours of walls and global behaviours of a province. The out-of-plane assessment by non-linear kinematic analysis ( NLKA ) is automated via the database without further calculations after the static analysis. The database provides a solid guidance to determine which detailed assessment methods will be adopted with limited data before a FEM model is built

Determination of Concrete Cube Strength from Used Samples / Určení Krychelné Pevnosti Betonu U Použitých Zkušebních Trámců

2012 ◽  
Vol 12 (2) ◽  
pp. 186-194 ◽  
Author(s):  
Oldřich Sucharda ◽  
David Mikolášek ◽  
Jiří Brožovský
Keyword(s):  
Compressive Strength ◽  
Concrete Beams ◽  
Linear Analysis ◽  
Bending Tests ◽  
Cube Strength ◽  
Non Linear ◽  
Compressive Strength Of Concrete ◽  
Concrete Cube

Abstract This paper deals with the determination of compressive strength of concrete. Cubes, cylinders and re-used test beams were tested. The concrete beams were first subjected to three-point or fourpoint bending tests and then used for determination of the compressive strength of concrete. Some concrete beams were reinforced, while others had no reinforcement. Accuracy of the experiments and calculations was verified in a non-linear analysis.

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